-#include <asm/types.h>--struct scatterlist {-#ifdef CONFIG_DEBUG_SG- unsigned long sg_magic;-#endif- unsigned long page_link;- unsigned int offset;- dma_addr_t dma_address;- unsigned int length;-};--/*- * These macros should be used after a pci_map_sg call has been done- * to get bus addresses of each of the SG entries and their lengths.- * You should only work with the number of sg entries pci_map_sg- * returns, or alternatively stop on the first sg_dma_len(sg) which- * is 0.- */-#define sg_dma_address(sg) ((sg)->dma_address)-#define sg_dma_len(sg) ((sg)->length)-+#include <asm-generic/scatterlist.h>